        -:    0:Source:/usr/include/c++/9/new
        -:    1:// The -*- C++ -*- dynamic memory management header.
        -:    2:
        -:    3:// Copyright (C) 1994-2019 Free Software Foundation, Inc.
        -:    4:
        -:    5:// This file is part of GCC.
        -:    6://
        -:    7:// GCC is free software; you can redistribute it and/or modify
        -:    8:// it under the terms of the GNU General Public License as published by
        -:    9:// the Free Software Foundation; either version 3, or (at your option)
        -:   10:// any later version.
        -:   11:// 
        -:   12:// GCC is distributed in the hope that it will be useful,
        -:   13:// but WITHOUT ANY WARRANTY; without even the implied warranty of
        -:   14:// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        -:   15:// GNU General Public License for more details.
        -:   16:// 
        -:   17:// Under Section 7 of GPL version 3, you are granted additional
        -:   18:// permissions described in the GCC Runtime Library Exception, version
        -:   19:// 3.1, as published by the Free Software Foundation.
        -:   20:
        -:   21:// You should have received a copy of the GNU General Public License and
        -:   22:// a copy of the GCC Runtime Library Exception along with this program;
        -:   23:// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
        -:   24:// <http://www.gnu.org/licenses/>.
        -:   25:
        -:   26:/** @file new
        -:   27: *  This is a Standard C++ Library header.
        -:   28: *
        -:   29: *  The header @c new defines several functions to manage dynamic memory and
        -:   30: *  handling memory allocation errors; see
        -:   31: *  http://gcc.gnu.org/onlinedocs/libstdc++/18_support/howto.html#4 for more.
        -:   32: */
        -:   33:
        -:   34:#ifndef _NEW
        -:   35:#define _NEW
        -:   36:
        -:   37:#pragma GCC system_header
        -:   38:
        -:   39:#include <bits/c++config.h>
        -:   40:#include <exception>
        -:   41:
        -:   42:#pragma GCC visibility push(default)
        -:   43:
        -:   44:extern "C++" {
        -:   45:
        -:   46:namespace std 
        -:   47:{
        -:   48:  /**
        -:   49:   *  @brief  Exception possibly thrown by @c new.
        -:   50:   *  @ingroup exceptions
        -:   51:   *
        -:   52:   *  @c bad_alloc (or classes derived from it) is used to report allocation
        -:   53:   *  errors from the throwing forms of @c new.  */
        -:   54:  class bad_alloc : public exception 
        -:   55:  {
        -:   56:  public:
    #####:   57:    bad_alloc() throw() { }
        -:   58:
        -:   59:#if __cplusplus >= 201103L
        -:   60:    bad_alloc(const bad_alloc&) = default;
        -:   61:    bad_alloc& operator=(const bad_alloc&) = default;
        -:   62:#endif
        -:   63:
        -:   64:    // This declaration is not useless:
        -:   65:    // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
        -:   66:    virtual ~bad_alloc() throw();
        -:   67:
        -:   68:    // See comment in eh_exception.cc.
        -:   69:    virtual const char* what() const throw();
        -:   70:  };
        -:   71:
        -:   72:#if __cplusplus >= 201103L
        -:   73:  class bad_array_new_length : public bad_alloc
        -:   74:  {
        -:   75:  public:
        -:   76:    bad_array_new_length() throw() { }
        -:   77:
        -:   78:    // This declaration is not useless:
        -:   79:    // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
        -:   80:    virtual ~bad_array_new_length() throw();
        -:   81:
        -:   82:    // See comment in eh_exception.cc.
        -:   83:    virtual const char* what() const throw();
        -:   84:  };
        -:   85:#endif
        -:   86:
        -:   87:#if __cpp_aligned_new
        -:   88:  enum class align_val_t: size_t {};
        -:   89:#endif
        -:   90:
        -:   91:  struct nothrow_t
        -:   92:  {
        -:   93:#if __cplusplus >= 201103L
        -:   94:    explicit nothrow_t() = default;
        -:   95:#endif
        -:   96:  };
        -:   97:
        -:   98:  extern const nothrow_t nothrow;
        -:   99:
        -:  100:  /** If you write your own error handler to be called by @c new, it must
        -:  101:   *  be of this type.  */
        -:  102:  typedef void (*new_handler)();
        -:  103:
        -:  104:  /// Takes a replacement handler as the argument, returns the
        -:  105:  /// previous handler.
        -:  106:  new_handler set_new_handler(new_handler) throw();
        -:  107:
        -:  108:#if __cplusplus >= 201103L
        -:  109:  /// Return the current new handler.
        -:  110:  new_handler get_new_handler() noexcept;
        -:  111:#endif
        -:  112:} // namespace std
        -:  113:
        -:  114://@{
        -:  115:/** These are replaceable signatures:
        -:  116: *  - normal single new and delete (no arguments, throw @c bad_alloc on error)
        -:  117: *  - normal array new and delete (same)
        -:  118: *  - @c nothrow single new and delete (take a @c nothrow argument, return
        -:  119: *    @c NULL on error)
        -:  120: *  - @c nothrow array new and delete (same)
        -:  121: *
        -:  122: *  Placement new and delete signatures (take a memory address argument,
        -:  123: *  does nothing) may not be replaced by a user's program.
        -:  124:*/
        -:  125:_GLIBCXX_NODISCARD void* operator new(std::size_t) _GLIBCXX_THROW (std::bad_alloc)
        -:  126:  __attribute__((__externally_visible__));
        -:  127:_GLIBCXX_NODISCARD void* operator new[](std::size_t) _GLIBCXX_THROW (std::bad_alloc)
        -:  128:  __attribute__((__externally_visible__));
        -:  129:void operator delete(void*) _GLIBCXX_USE_NOEXCEPT
        -:  130:  __attribute__((__externally_visible__));
        -:  131:void operator delete[](void*) _GLIBCXX_USE_NOEXCEPT
        -:  132:  __attribute__((__externally_visible__));
        -:  133:#if __cpp_sized_deallocation
        -:  134:void operator delete(void*, std::size_t) _GLIBCXX_USE_NOEXCEPT
        -:  135:  __attribute__((__externally_visible__));
        -:  136:void operator delete[](void*, std::size_t) _GLIBCXX_USE_NOEXCEPT
        -:  137:  __attribute__((__externally_visible__));
        -:  138:#endif
        -:  139:_GLIBCXX_NODISCARD void* operator new(std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
        -:  140:  __attribute__((__externally_visible__, __malloc__));
        -:  141:_GLIBCXX_NODISCARD void* operator new[](std::size_t, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
        -:  142:  __attribute__((__externally_visible__, __malloc__));
        -:  143:void operator delete(void*, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
        -:  144:  __attribute__((__externally_visible__));
        -:  145:void operator delete[](void*, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
        -:  146:  __attribute__((__externally_visible__));
        -:  147:#if __cpp_aligned_new
        -:  148:_GLIBCXX_NODISCARD void* operator new(std::size_t, std::align_val_t)
        -:  149:  __attribute__((__externally_visible__));
        -:  150:_GLIBCXX_NODISCARD void* operator new(std::size_t, std::align_val_t, const std::nothrow_t&)
        -:  151:  _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__, __malloc__));
        -:  152:void operator delete(void*, std::align_val_t)
        -:  153:  _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__));
        -:  154:void operator delete(void*, std::align_val_t, const std::nothrow_t&)
        -:  155:  _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__));
        -:  156:_GLIBCXX_NODISCARD void* operator new[](std::size_t, std::align_val_t)
        -:  157:  __attribute__((__externally_visible__));
        -:  158:_GLIBCXX_NODISCARD void* operator new[](std::size_t, std::align_val_t, const std::nothrow_t&)
        -:  159:  _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__, __malloc__));
        -:  160:void operator delete[](void*, std::align_val_t)
        -:  161:  _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__));
        -:  162:void operator delete[](void*, std::align_val_t, const std::nothrow_t&)
        -:  163:  _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__));
        -:  164:#if __cpp_sized_deallocation
        -:  165:void operator delete(void*, std::size_t, std::align_val_t)
        -:  166:  _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__));
        -:  167:void operator delete[](void*, std::size_t, std::align_val_t)
        -:  168:  _GLIBCXX_USE_NOEXCEPT __attribute__((__externally_visible__));
        -:  169:#endif // __cpp_sized_deallocation
        -:  170:#endif // __cpp_aligned_new
        -:  171:
        -:  172:// Default placement versions of operator new.
        -:  173:_GLIBCXX_NODISCARD inline void* operator new(std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
        -:  174:{ return __p; }
        -:  175:_GLIBCXX_NODISCARD inline void* operator new[](std::size_t, void* __p) _GLIBCXX_USE_NOEXCEPT
        -:  176:{ return __p; }
        -:  177:
        -:  178:// Default placement versions of operator delete.
        -:  179:inline void operator delete  (void*, void*) _GLIBCXX_USE_NOEXCEPT { }
        -:  180:inline void operator delete[](void*, void*) _GLIBCXX_USE_NOEXCEPT { }
        -:  181://@}
        -:  182:} // extern "C++"
        -:  183:
        -:  184:#if __cplusplus >= 201703L
        -:  185:#ifdef _GLIBCXX_HAVE_BUILTIN_LAUNDER
        -:  186:namespace std
        -:  187:{
        -:  188:#define __cpp_lib_launder 201606
        -:  189:  /// Pointer optimization barrier [ptr.launder]
        -:  190:  template<typename _Tp>
        -:  191:    [[nodiscard]] constexpr _Tp*
        -:  192:    launder(_Tp* __p) noexcept
        -:  193:    { return __builtin_launder(__p); }
        -:  194:
        -:  195:  // The program is ill-formed if T is a function type or
        -:  196:  // (possibly cv-qualified) void.
        -:  197:
        -:  198:  template<typename _Ret, typename... _Args _GLIBCXX_NOEXCEPT_PARM>
        -:  199:    void launder(_Ret (*)(_Args...) _GLIBCXX_NOEXCEPT_QUAL) = delete;
        -:  200:  template<typename _Ret, typename... _Args _GLIBCXX_NOEXCEPT_PARM>
        -:  201:    void launder(_Ret (*)(_Args......) _GLIBCXX_NOEXCEPT_QUAL) = delete;
        -:  202:
        -:  203:  void launder(void*) = delete;
        -:  204:  void launder(const void*) = delete;
        -:  205:  void launder(volatile void*) = delete;
        -:  206:  void launder(const volatile void*) = delete;
        -:  207:}
        -:  208:#endif // _GLIBCXX_HAVE_BUILTIN_LAUNDER
        -:  209:#endif // C++17
        -:  210:
        -:  211:#if __cplusplus > 201703L
        -:  212:namespace std
        -:  213:{
        -:  214:  struct destroying_delete_t
        -:  215:  {
        -:  216:    explicit destroying_delete_t() = default;
        -:  217:  };
        -:  218:  inline constexpr destroying_delete_t destroying_delete{};
        -:  219:}
        -:  220:// Only define the feature test macro if the compiler supports the feature:
        -:  221:#if __cpp_impl_destroying_delete
        -:  222:# define __cpp_lib_destroying_delete 201806L
        -:  223:#endif
        -:  224:#endif // C++20
        -:  225:
        -:  226:#pragma GCC visibility pop
        -:  227:
        -:  228:#endif
